| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 46430 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Apr 19 20:24 | 2025 Mar 31 08:21 |
| Time of closest approach (UTC) | 2024 May 31 18:37:54.801 |
| Minimum distance | 3770.573 km |
| Height difference | -87.571 km |
| Relative speed | 14.846 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 46.2°N, 133.0°E |
| Height | 771 km |
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